878 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



or 13 inches), but in one naked except at tip, the latter species having • 

 the entire forencck denuded and covered with an inflatable skin of a 

 scarlet or reddish orange color. In all species the coloration is uni- 

 form black (in both sexes), sometimes with white on under wing- 

 coverts. 



Jiange. — Costa Rica to western Ecuador, Bolivia, and southwestern 

 Brazil. (Three species.) 



KEY TO THE SPECIES OF CEPIIALOPTERUS. 



a. Under parts of body deep black; umbrella-like crest larger, with conspicuously 



recurved margins; a conspicuous gular appendage. (Adult males.) 



b. Throat and foreiieck entirely feathered ; gular appendage entirely covered with 



broad, imbricated feathers. 



c. Stems of frontal plumes white (except terminally); under wing-coverts mostly 



blackish or dusky (partly light grayish); gular appendage shorter (75-155 



mm., to end of terminal feathers). (Coloml)ia 1o Guiana, Brazil, and Bolivia.) 



Cephalopterus ornatus (extralimital)a 



cc. Stems of frontal j)lumes black (except at extreme base); under wing-coverts 



extensively white; gular appendage longer (sometimes more than 300 mm.) 



(Western Ecuador.) Cephalopterus penduliger (extraliniital) b 



hh. Throat and foreneck naked (only the upper throat and chin feathered) ; gular 

 appendage naked with a tuft of small narrow feathers at tip. (Costa Rica and 



Panama.) .Cephalopterus glabricoUis, male (p. 878) 



aa. Under parts of body dull lilack or sooty brown, the feathers with narrow paler mar- 

 gins; crest much smaller, without recurved margins; gular appendage very 

 short or rudimentary. (Adult females.) 

 h. No visible naked space on side of neck; under parts of body black; crest glossy 



blue-black Cephalopterus ornatus, female (extralimital) « 



hh. A conspicuous naked space on side of neck; under parts of body dark grayish 

 brown or sooty; crest dull black Cephalopterus glabricoUis, female (p. 879) 



CEPHALOPTERUS GLABRICOLLIS Gould. 

 BARE-NECKED UMBRELLA BIRD. 



Adult male. — General color black, the umbrella-shaped crest 

 faintly glossed with violet-bluish, the feathers of hindneck margined 

 with steel blue, the rest of upper parts faintly glossed with the same 

 or with more violaceous blue; under parts of body duller (more sooty) 

 olack, the feathers with pale brown or dull whitish shafts; sides of 



a Ceplinlopterus ornatus Geoffroy, Ann. d. Mus. Paris, xiii, 1809, 238, pi. 17; Sclater, 

 Cat. Birds Brit. Mus., xiv, 1888, 399.— Coraeina ornata Spix, Av. Bras., i, 1824, 63, 

 pi. b^.—Comdna cephalopteraYiaiWot, Kouv. Diet. d'Hist. Nat., viii, 1817, 5, pi. B. 

 22, fig. 2 (Brazil); Gal. Ois., i, 1826?, 179, pi. 114; Temminck, PL Col., livr. 43, 1824, 

 pi. 2hb.— C\oradna\ ornata Lafresnaye and D'Orbigny, Mag. de ZooL, 1839 (Synop. 

 Av., p. ?,^).—Am2jelis umbellata Shaw, Nat. Misc., xxi, no. 6, Feb., 1810, pi. 897 (new 

 name for Cephalo2iterus ornatus Geoffroy). 



b Cephalopterus penduliger Sclater, Ibis, Jan., 1859, 114, pi. 3 (Pallatanga, w. Ecua- 

 dor; coll. P. L. Sclater); Cat. Birds Brit. Mus., xiv, 1888, 400. 



c The female of C. penduliger not seen by me. 



